There's also this thing https://www.protectimus.com/protectimus-slim-mini https://www.protectimus.com/protectimus-slim-mini A little different because it does n

There's also this thing https://www.protectimus.com/protectimus-slim-mini https://www.protectimus.com/protectimus-slim-mini A little different because it does not plug in, but very convenient. It seems like the usb key solutions are likely to get left plugged into the port, and so get stolen along with the laptop. The protectimus idea is to keep the key on you at all times.